<p><p><p><p><p> Alwara Lake is located in Kaushambi district of Uttar Pradesh. This lake is one of the perennial wetland (water logged area), biota of which is influenced by several physico-chemical parameters. The said lake has a vast dynamic landscape which is created by annual flooding of adjacent river Yamuna. In this water ecosystem, phytoplankton is major producers which fix energy and transfers to the land. Present investigation is an attempt to assess some phytoplankton families and monthlies variations in their density. Present study will not only attract the biologists for further study but also help to frame appropriate strategy for the development of Wetland (Alwara Lake).</p></p></p></p></p>